Amtrak is once again running a double points promotion, this time for travel from Sept. 9 through Oct. 31, 2013. Amtrak Guest Rewards members who register for the promotion will earn double points on qualifying Amtrak travel. There is a limit of two qualifying one-way trips per day. Visit http://AmtrakGuestRewards.com/DoubleDays to learn more and to register for the promotion.